2 years ago

Plugin y=-5 into either equation and solve for x -6x-8y=-20 or x+y=5

Mathematics

2 answers:

Ludmilka [50]2 years ago

7 0

Answer:

x = 10

Step-by-step explanation:

If you substitute into the second one which is the relatively easier one. You would get:

x + (-5 ) =5

x =5 +5

x= 10

nalin [4]2 years ago

3 0

Answer:

x = 10

Step-by-step explanation:

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Rounded to the nearest hundredth, what is the positive solution to the quadratic equation 0 = 2x2 + 3x – 8? Quadratic formula: x

OleMash [197]

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$x=1.39$ to the nearest hundredth.

EXPLANATION

We have the equation,

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Which can be rewritten as

$2x^2+3x-8=0$

The question demands the use of the quadratic formula.

Comparing this to the general quadratic equation;

$ax^2+bx+c=0$

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The quadratic formula is given by;

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

We now substitute all the values in to the formula;

$x=\frac{-3\pm\sqrt{(3)^2-4(2)(-8)}}{2(2)}$

We simplify to obtain;

$x=\frac{-3\pm\sqrt{9+64}}{4}$

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We now split the plus or minus sign to obtain;

$x=\frac{-3-\sqrt{73}}{4}$

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4 years ago

Read 3 more answers

Jamiah bought two 125 ounce bags of flour for baking. He used up 32 ounces of flour to bake a batch of brownies. How much flour

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